Process of preserving wood-oil from congealing on being subjected to heat.



um TED STATES PATENT OFFICE.

EMID BERINGER AND WILHELM ZIMMER, 0F CHARLOTTENBURQ GERMANY, ASSIGN- OBS TO THE FIRM 0F REICHHOLD, FL'flGGER & BOECKING, LAG-VARNISH MANU- FACTURERS, OF HAMBURG, GERMANY.

PROCESS OF- PRESER'VING WOOD-OIL FROM CONGEALING ON BEING SUBJECTE'D '10 HEAT.

1,103, 17 3. No Drawing.

To all whom it may concern Be it known that we, EMIL Bnnmcnn, a subject of the King of Prussia, residing at No. 18 Sophienstrasse, Charlottenburg, in the Kingdom of Prussia, German Emplre,

and WILHELM ZIMMER, a subject of the jected to Heat, of which the following is a specification.

As is fully known this objectionable tendency to congeal on heating is a bar in boiling wood oil down to a faultless boiled .oil. Those processes recommending an admixture of lime, alkali, alkaline carbonate, or zinc-dust produce nosatisfactory results.

Now, we have made the surprising discovery that an addition of selenium, or sulfur, selenids, or sulfids,-neutralizes the tendency to congeal, no matter whether low or high temperatures, exceeding 300 C. consider ably, are applied. Surprising too is the small percentage of selenium or sulfur re quired to preserve the wood oil from congealing in the process of heating.

Through our new process wood oil may now be applied to a far greater extent than hitherto, in all those industries using varnish, boiled oil, etc., all the more so, because wood oil as compared with linseed oil and the like is more suitable in many cases; to this must be added the fact that varnishes produced with wood oil treated in accordance with our new invention are waterproof to an unparalleled degree, and are not liable to harden into tough surfaces when subjected to air.

I. Recipe.--To 100 kilograms of wood oil 20 to grams of selenium are gradually since the isolated fatty acids have a melting point considerably higher than the melting Specification of Letters Patent. Patented July 14, 1914. Application filed September 23, 1913. Serial No. 791,317.

point of the fatty acids obtained from untreated oil. I

]l.,Recz'pe.-To 100 kilograms of wood i oil from to 120 grams of sulfur are addedv as described in the I. Recipe. This oil may, as a matter of course, be converted into lac-varnish by addition of resins in the same operation. If selenids or sulfids are employed larger quantities must be used.

We wish it to be understood, that for the purposes of this invention, sulfids, selenium and selenids are to be considered equivalents of sulfur.

We claim The process of convertin wood oil into an oil not congealing onbelng subjected to heat, which consists in adding to the wood oil a very small quantity of sulfur, substantially as herein described.

EMIL BERINGER.

WILHELM ZIMMER.

' Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

